How to download subtitles/text tracks of a On Demand Vimeo video

vimeo_download_subtitles.md

Download subtitles/text tracks of an On-Demand Vimeo video

It works with on-demand videos that have the subtitles/captions included (CC symbol). You need to be registered in Vimeo in order to retrieve subtitles.

Steps

1. Open Chrome Developer Tools
2. Start playing the Vimeo video
3. Look for any request named segment-XX.m4s (where XX is a number)
4. Select the request and inspect the request payload, which is something in the form:

{"referrer":"https://vimeo.com/ondemand/followingseas","embed":false,"context":"Vimeo\\Controller\\OnDemandController.main","autoplay":0,"loop":0,"id":242740761,"vodId":128898,"vodSaleId":5911177,"sessionTime":22.604,"videoShape":0,"spatialPlayback":0,"userId":"xxxxxxxx","userAccountType":"basic","userIsMod":0,"ownerId":18500210,"ownerAccountType":"pro","privacy":"ptv","rating":6,"type":"html","videoFileId":"872163031","delivery":"dash","profileId":175,"quality":"sd","duration":5116.501,"seconds":536.483,"isLive":0,"playbackRate":1,"signature":"e8116054b8ca3f524be3091135c93cb5","session":"xxxxxxxxxxxxxxxxxxxxxxxxxxx","time":1535639774,"expires":20468}

5. Copy the value of the field called id (i.e. "id":242740761)
6. Go to Vimeo API Playground: https://developer.vimeo.com/api/playground/videos/%7Bvideo_id%7D/texttracks (note that you need to be registered in Vimeo to do some API calls)
7. In the Playground form, replace {video_id} for your video ID (i.e. 242740761)
8. Check the checkbox that says Authenticate this call as John Doe
9. Push the Make call button
10. If everything works as expected, the successful HTTP request will be outputed. Something like the following:

HTTP/1.1 200
Content-Type: application/vnd.vimeo.video.texttrack+json
Host: api.vimeo.com

{
    "total": 1,
    "data": [
        {
            "uri": "/videos/242740761/texttracks/5795943",
            "active": true,
            "type": "captions",
            "language": "en",
            "link": "https://captions.cloud.vimeo.com/captions/5795943.vtt?expires=1535648880&sig=357c4574e58e805af3b5ef2df4cd075bdc1c1ba8&download=FollowingSeas+CC.srt.vtt",
            "link_expires_time": 1535648880,
            "hls_link": "https://captions.cloud.vimeo.com/captions/5795943.vtt?expires=1535648880&sig=357c4574e58e805af3b5ef2df4cd075bdc1c1ba8&download=FollowingSeas+CC.srt.vtt&hls=1",
            "hls_link_expires_time": 1535648880,
            "name": "FollowingSeas CC.srt"
        }
    ]
}

11. Copy the value of the link attribute (i.e "https://captions.cloud.vimeo.com/captions/5795943.vtt?expires=1535648880&sig=357c4574e58e805af3b5ef2df4cd075bdc1c1ba8&download=FollowingSeas+CC.srt.vtt")
12. Paste it in your browser and the subtitles will start downloading :)

This worked for me as easy solution: https://www.youtube.com/watch?v=Mk6SmkKVZzA
Just copy subtitles fom dev tools -> network -> *.vtt file -> preview